Greenish-blue wool-dye.



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WILHELM BEECHELMANN, 0F VOHVINIKEL, NEAR ELBERFELD, GERMAIf-Y, ASSIGNGB'T0 FARBENFABRIKEN VOBM. FRIEDR. BAYER dc C0., 03 ELBERFELID, GERMANY, A

GORPORATIQIE 9F GERMANY.

GBEENISF-BLUE wooL-nYn.

inaasea N 0 Drawing.

T 0 all whom it may concern:

Be it known that I, WILHnLMBnnonnn- MANN, doctor of philosophy, chemist,citizen of'the German Empire, residing at Vohwinkel, near Elberfeld,Germany, have invented new and useful Improvementsin Greenish-BlueWool-Dye, of'which the fol lowing is a specification.

I have found that a new and valuable dye can be obtained. by treatingS-nitro-Letdiaminoanthraquinone use with epichlorhydrin cH2o1 pH GH/ andtreating the product thus produced with a sulfonating agent. The new dyehaving most probably the formula:

I ou -cn-cu ci Specification of letters Patent.

Application filedJuly 2, 1912. Serial No. 707,336.

parts being by Weight:A mixture of 20 parts of5-nitro-l-t-diaminoanthraquinone, 28 parts of a 90 per cent. formic acidand 100 parts of epichlorhydrin is stirred at" from 30--35 C.v until ithas assumed agreenish-blue coloration. The new product thus obtainedseparates. When the quantity of the'precipitate does no longer increase,it is filtered 0d,. washed with water, dried andtreated with. hotnitrobenzene. 10 parts of the product are then introduced-into 200 partsof fuming sulfuric acid (5 per cent. S0 and the mixture is stirred at10-15 C. until a sample is soluble in water. it is then poured on icewater, the dye is salted out with potassium chlorid and dried.

I claim As a new product the sulfonated condensation product having mostprobably the formula:

CH2-CH-CH2G1 IiIH u SOaH which dye is after being dried and pulverizedin the shape of its alkaline salt a bluish powder soluble in water witha blue and in concentrated sulfuric acid with a brown coloration whichafter a short time chan es into red and dyeing wool greenish-b ue shadesfast tolight, substantially as described. y

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

WILHELM BERCHELMANN. lVitnesses:

NUFER, Cirrus. J. NRIGHT.

